<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>

        div{
            width: 400px;
            height: 400px;
            background:#ec6d71;

            padding: 10px 20px 30px;
            margin-left: auto;
            margin-right: auto;


        }
    </style>
</head>
<body>
<div>
div1
</div>
<p>段落标签</p>
<h1>标题标签</h1>
<input type="text"/>
<batton>按钮</batton>

</body>
</html>